This is a case of rotating locomotion.
Simply put, this is highly unlikely to evolve in a single organism:
Any evolved structure must be useful as a less-evolved structure at any point in the organism's evolutionary history, or it must be able to be evolved with a single mutation.
If a living part of an organism is to rotate, it must either be so small that it obtains its nutrients directly from its environment, or the means by which metabolic requirements and communication are fulfilled must first be evolved.
If a non-living part of an organism is to rotate, a mechanism for its construction must exist, and the integrity of this separated-but-retained dead body part may become a limiting factor for the survival of the organism, or else a means of replacement must exist.
It is far more likely that an organism will evolve a particular capability using means that require fewer steps and pre-conditions, and it is generally not possible to evolve a capability if a reduction in fitness is a pre-requisite.
It is not beyond the bounds of possibility for this 'organism' to actually be two or more organisms, a 'body' and two (perhaps different) 'wings', that combine to form a single rotary-winged unit. However, the organisms' ancestors must have been viable in a less-evolved state.
Perhaps this symbiotic grouping evolved when a 'body' ancestor took to hanging on to one or two 'rotor' ancestors in such a way that when the group fell, the rotors would rotate, providing increased drag and retarding a fall, allowing safe falls from a greater, potentially unlimited, height.
By evolving the means to power the rotation of the rotor symbiotes, the loss of altitude could be further slowed and eventually negated and then reversed. Communication between the symbiotes could evolve, giving the ability to change wing aspect on command from the body, as could symbiotic nutrition, the body feeding its symbiotic wings when convenient.
While the organisms involved must at some point in time be capable of independent existence, there is no reason why they may not evolve in tandem to be totally dependent on one-another, any wing lacking a body or any body lacking its wing(s) being far less or even unable to survive without the other(s). These organisms would breed and reproduce together, and would get together in infancy and then remain a group, the loss of any one of the group being fatal to the other(s).
However, prior to the evolutionary point where symbiosis becomes obligate, it may be possible for a body to acquire a new wing, and vice-versa.
It is possible that the wings and bodies may be two completely different species, or that they may be the same species, but different genders, the female bodies being in symbiosis with the male wings.